Ngk Iridium Ix Dcpr7Eix Spark Plugs Compatible With 1999-2016 Harley Davidson Twin Cam (Pair)

Descriptiongain Up To 3Hp Just By Using These Plugs! The Ultimate In Spark Plug Technology And Performance From The Industry Leader The Iridium Electrode Is 25% Smaller Than A Platinum Electrode, And It’S Just 1/4 The Size Of A Conventional Nickel Electrode Ultra-Small Diameter Center Electrode Reduces Voltage Requirement And Extends Ignition System Life New Metal Shell Plating Has Enhanced Anticorrosion Qualities Come Pre-Gapped